I am working with a custom hardware design similar to the BF537 Stamp. It has a single Ethernet jack which works fine. We have an application where we need to handle some routing (similar to the WAN and LAN ports on a typical home router) for which I believe (please correct me if I am wrong) we need not just an ethernet switch, but a separate network interface (eth0/eth1). Rather than changing the PCB to add a second network interface, we are considering using a USB-to-ethernet adapter such as the SMSC 95xx series, maybe the 9512. It appears that several chips in that series are listed in the products array in smsc95xx.c. Has anyone tried them on Blackfin? Is there any reason to think that they wouldn't work out of the box?